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System and method for producing ethylene unit raw material from residual oil

An ethylene plant and raw material technology, which is applied in the petroleum industry, hydrocarbon oil treatment, hydrotreating process, etc., can solve the problems of poor adaptability of residual oil raw materials, etc.

Active Publication Date: 2021-12-17
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method adopts a single coking process technology, coking wax oil circulation operation, and can produce naphtha and light diesel oil in a large amount. Only when better paraffin-based raw materials are used, naphtha can be directly used as raw materials for ethylene units, which is suitable for residual oil raw materials. Poor sex

Method used

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  • System and method for producing ethylene unit raw material from residual oil
  • System and method for producing ethylene unit raw material from residual oil
  • System and method for producing ethylene unit raw material from residual oil

Examples

Experimental program
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Effect test

Embodiment 1

[0045] according to figure 1 The technological process of this method is to use residual oil raw material 1 as the raw material oil (see Table 2 for properties), heat and low-pressure separator to extract all light oil fractions (temperature is 350~400°C) and mix them with coking raw materials (temperature is generally room temperature), After being heated by the heating furnace to the coking reaction temperature, it enters the coke tower;

[0046] After the naphtha in the fluidized bed hydrogenation reaction zone is mixed with the naphtha in the coking reaction zone, the temperature is 220°C, and then enters the naphtha hydrogenation unit. The reaction conditions are: reaction pressure 2.8MPa, volume space velocity 3.0h -1 , The inlet temperature of the reactor is 237°C, and the volume ratio of hydrogen to oil is 280. The product properties are listed in Table 3. Water injection in front of the heating furnace of the coking reaction unit is canceled. No cooling equipment i...

Embodiment 2

[0048] according to figure 2 The technological process, using residue oil raw material 2 (see Table 2 for properties) as the raw material oil, all the light oil fractions drawn from the hot low-pressure separator enter the cooling equipment to cool at 40°C, and then enter the cold low-pressure separator, and the liquid separated by the cold low-pressure separator The phase temperature is 40°C, heated by a heat exchanger to 245°C, and enters the fluidized bed fractionation tower;

[0049] The naphtha in the fluidized bed residue hydrogenation reaction zone and the naphtha in the coking reaction zone are mixed at a temperature of 215°C and enter the naphtha hydrogenation unit. The reaction conditions are: reaction pressure 3.5MPa, volume space velocity 2.6h -1 , The inlet temperature of the reactor is 233°C, and the volume ratio of hydrogen to oil is 310. A cooling device is arranged between the hot low-pressure separator and the cold low-pressure separator. A heating device ...

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Abstract

The invention discloses a system and a method for producing an ethylene unit raw material from residual oil. The system comprises a fluidized bed hydrogenation reaction zone, a coking reaction zone and a naphtha hydrogenation reaction zone. The method comprises the following steps of: (1) carrying out hydrogenation reaction on a residual oil raw material and hydrogen, carrying out gas-liquid separation on generated oil, and fractionating a liquid phase to obtain naphtha, diesel oil, wax oil and an unconverted fraction; (2) carrying out a coking reaction by using the unconverted fraction in the step (1) as a coking raw material, and fractionating coking generated oil to obtain coker naphtha, coker diesel oil and coker gas oil; and (3) carrying out hydrofining reaction on the naphtha obtained in the step (1), the coker naphtha obtained in the step (2) and hydrogen, and carrying out steam stripping on hydrofined oil to obtain a qualified ethylene unit raw material. According to the invention, a qualified ethylene unit raw material can be produced from residual oil, the yield of light oil is further improved, the loss of heat in the system is reduced, and the economical efficiency and the environment-friendliness are further enhanced.

Description

technical field [0001] The invention belongs to the field of petroleum refining, and in particular relates to a system and method for producing raw materials of ethylene equipment from residual oil. Background technique [0002] Residual oil, as the heaviest fraction and the worst part of crude oil, has always been a difficult point for refiners to process. At this stage, most enterprises adopt fixed-bed residue hydrogenation technology in their residual oil hydrogenation process, and refined oil provides raw materials for catalytic cracking units. In recent years, with the heavy and inferior quality of crude oil, the content of residual carbon, heavy metals and asphaltenes in residual oil is getting higher and higher, which greatly increases the processing difficulty of fixed bed residual oil hydrogenation unit, while ebullating bed slag In oil hydrogenation technology, because the catalyst is in a fluidized state, it can be replaced online, so it can process residual oil ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G67/00
CPCC10G67/00C10G2300/4006C10G2300/4012C10G2300/4018C10G2300/70
Inventor 徐大海丁贺陈光李扬牛世坤李士才代萌张翰周嘉文
Owner CHINA PETROLEUM & CHEM CORP
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